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Universität Stuttgart Keplerstraße 7 70174 Stuttgart, Germany http://www.uni-stuttgart.de
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Universität Stuttgart

Alte Himmelskörper mit frischer Oberfläche

Stuttgarter Astronomen studieren erstmalig ein Kuiper Belt Objekt bei einer Sternbedeckung

(PresseBox) (Stuttgart, )
Im äußeren Bereich des Sonnensystems liegt eine als "Kuiper Gürtel" bezeichnete Region, in der tausende mondgroße, eisige Himmelkörper (engl. Kuiper Belt Objects, KBOs) umherdriften. Ihre vergleichsweise geringe Größe und ihre große Entfernung machen es jedoch schwierig, KBOs in ihren Einzelheiten zu untersuchen. Eine Möglichkeit dazu besteht, während ein KBO kurz vor einem hellen Stern vorbei läuft: Aus der Messung der Veränderungen des Sternlichtes während dieser als "Sternbedeckung" bezeichneten Phase können Astronomen die Größe und Temperatur des bedeckenden Himmelskörpers sowie das mögliche Vorhandensein einer Atmosphäre ableiten. Um jedoch am richtigen Ort und zur richtigen Zeit zu beobachten, muss man die Umlaufbahn
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